Submission #891117
Source Code Expand
# include <stdio.h> # include <bits/stdc++.h> using namespace std; # define fi cin # define fo cout # define x first # define y second # define ll long long # define IOS ios_base :: sync_with_stdio(0);cin.tie(0) # define p(v) cerr << #v << " = " << v << '\n' # define p2(v) cerr << #v << " = " << (complex < int > (v.x,v.y)) << '\n' # define vi vector < int > # define vll vector < ll > # define pii pair < int , int > //# pragma GCC target ("sse4") int main(void) { #ifdef CF freopen("input","r",stdin); #endif // CF srand(time(0)); fo << fixed << setprecision(7); cerr << fixed << setprecision(7); int n; fi>>n; static int p[1 << 20]; for (int i = 1;i <= n;++i) fi>>p[i]; int ans = 0; for (int i = 1;i <= n;++i) ans += p[p[i]] == i; fo << ans / 2 << '\n'; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | reality |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 874 Byte |
Status | AC |
Exec Time | 35 ms |
Memory | 640 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_00.txt, 0_01.txt, 0_02.txt |
All | 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_00.txt | AC | 2 ms | 256 KB |
0_01.txt | AC | 2 ms | 256 KB |
0_02.txt | AC | 3 ms | 256 KB |
1_00.txt | AC | 3 ms | 256 KB |
1_01.txt | AC | 34 ms | 640 KB |
1_02.txt | AC | 35 ms | 640 KB |
1_03.txt | AC | 34 ms | 640 KB |
1_04.txt | AC | 35 ms | 640 KB |
1_05.txt | AC | 34 ms | 640 KB |
1_06.txt | AC | 35 ms | 640 KB |
1_07.txt | AC | 35 ms | 640 KB |
1_08.txt | AC | 14 ms | 384 KB |
1_09.txt | AC | 29 ms | 512 KB |
1_10.txt | AC | 25 ms | 512 KB |
1_11.txt | AC | 8 ms | 256 KB |